017dc06b50
Use t_str() instead of wx_str() to make the code work correctly in UTF-8 build in which wx_str() returns a pointer to UTF-8 buffer while we need a wchar_t pointer for Windows. Closes #14371. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71640 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
777 lines
21 KiB
C++
777 lines
21 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/listbox.cpp
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// Purpose: wxListBox
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// Author: Julian Smart
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// Modified by: Vadim Zeitlin (owner drawn stuff)
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// Created:
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_LISTBOX
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#include "wx/listbox.h"
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#ifndef WX_PRECOMP
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#include "wx/dynarray.h"
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#include "wx/settings.h"
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#include "wx/brush.h"
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#include "wx/font.h"
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#include "wx/dc.h"
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#include "wx/utils.h"
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#include "wx/log.h"
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#include "wx/window.h"
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#endif
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#include "wx/msw/private.h"
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#include "wx/msw/dc.h"
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#include <windowsx.h>
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#if wxUSE_OWNER_DRAWN
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#include "wx/ownerdrw.h"
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#endif
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// ============================================================================
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// list box item declaration and implementation
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// ============================================================================
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#if wxUSE_OWNER_DRAWN
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class wxListBoxItem : public wxOwnerDrawn
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{
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public:
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wxListBoxItem(wxListBox *parent)
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{ m_parent = parent; }
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wxListBox *GetParent() const
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{ return m_parent; }
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int GetIndex() const
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{ return m_parent->GetItemIndex(const_cast<wxListBoxItem*>(this)); }
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wxString GetName() const
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{ return m_parent->GetString(GetIndex()); }
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private:
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wxListBox *m_parent;
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};
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wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n))
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{
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return new wxListBoxItem(this);
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}
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#endif //USE_OWNER_DRAWN
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// ============================================================================
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// list box control implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// creation
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// ----------------------------------------------------------------------------
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void wxListBox::Init()
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{
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m_noItems = 0;
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m_updateHorizontalExtent = false;
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m_selectedByKeyboard = false;
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}
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bool wxListBox::Create(wxWindow *parent,
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wxWindowID id,
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const wxPoint& pos,
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const wxSize& size,
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int n, const wxString choices[],
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long style,
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const wxValidator& validator,
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const wxString& name)
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{
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// initialize base class fields
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if ( !CreateControl(parent, id, pos, size, style, validator, name) )
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return false;
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// create the native control
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if ( !MSWCreateControl(wxT("LISTBOX"), wxEmptyString, pos, size) )
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{
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// control creation failed
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return false;
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}
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// initialize the contents
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for ( int i = 0; i < n; i++ )
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{
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Append(choices[i]);
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}
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// now we can compute our best size correctly, so do it again
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SetInitialSize(size);
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return true;
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}
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bool wxListBox::Create(wxWindow *parent,
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wxWindowID id,
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const wxPoint& pos,
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const wxSize& size,
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const wxArrayString& choices,
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long style,
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const wxValidator& validator,
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const wxString& name)
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{
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wxCArrayString chs(choices);
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return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
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style, validator, name);
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}
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wxListBox::~wxListBox()
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{
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Clear();
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}
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WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
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{
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WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
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// we always want to get the notifications
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msStyle |= LBS_NOTIFY;
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// without this style, you get unexpected heights, so e.g. constraint
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// layout doesn't work properly
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msStyle |= LBS_NOINTEGRALHEIGHT;
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wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED),
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wxT("only one of listbox selection modes can be specified") );
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if ( style & wxLB_MULTIPLE )
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msStyle |= LBS_MULTIPLESEL;
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else if ( style & wxLB_EXTENDED )
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msStyle |= LBS_EXTENDEDSEL;
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wxASSERT_MSG( !(style & wxLB_ALWAYS_SB) || !(style & wxLB_NO_SB),
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wxT( "Conflicting styles wxLB_ALWAYS_SB and wxLB_NO_SB." ) );
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if ( !(style & wxLB_NO_SB) )
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{
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msStyle |= WS_VSCROLL;
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if ( style & wxLB_ALWAYS_SB )
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msStyle |= LBS_DISABLENOSCROLL;
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}
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if ( m_windowStyle & wxLB_HSCROLL )
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msStyle |= WS_HSCROLL;
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if ( m_windowStyle & wxLB_SORT )
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msStyle |= LBS_SORT;
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#if wxUSE_OWNER_DRAWN && !defined(__WXWINCE__)
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if ( m_windowStyle & wxLB_OWNERDRAW )
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{
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// we don't support LBS_OWNERDRAWVARIABLE yet and we also always put
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// the strings in the listbox for simplicity even though we could have
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// avoided it in this case
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msStyle |= LBS_OWNERDRAWFIXED | LBS_HASSTRINGS;
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}
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#endif // wxUSE_OWNER_DRAWN
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return msStyle;
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}
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void wxListBox::OnInternalIdle()
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{
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wxWindow::OnInternalIdle();
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if (m_updateHorizontalExtent)
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{
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SetHorizontalExtent(wxEmptyString);
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m_updateHorizontalExtent = false;
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}
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}
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void wxListBox::MSWOnItemsChanged()
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{
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// we need to do two things when items change: update their max horizontal
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// extent so that horizontal scrollbar could be shown or hidden as
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// appropriate and also invlaidate the best size
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//
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// updating the max extent is slow (it's an O(N) operation) and so we defer
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// it until the idle time but the best size should be invalidated
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// immediately doing it in idle time is too late -- layout using incorrect
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// old best size will have been already done by then
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m_updateHorizontalExtent = true;
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InvalidateBestSize();
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}
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// ----------------------------------------------------------------------------
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// implementation of wxListBoxBase methods
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// ----------------------------------------------------------------------------
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void wxListBox::DoSetFirstItem(int N)
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{
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wxCHECK_RET( IsValid(N),
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wxT("invalid index in wxListBox::SetFirstItem") );
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SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
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}
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void wxListBox::DoDeleteOneItem(unsigned int n)
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{
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wxCHECK_RET( IsValid(n),
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wxT("invalid index in wxListBox::Delete") );
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#if wxUSE_OWNER_DRAWN
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if ( HasFlag(wxLB_OWNERDRAW) )
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{
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delete m_aItems[n];
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m_aItems.RemoveAt(n);
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}
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#endif // wxUSE_OWNER_DRAWN
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SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
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m_noItems--;
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MSWOnItemsChanged();
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UpdateOldSelections();
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}
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int wxListBox::FindString(const wxString& s, bool bCase) const
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{
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// back to base class search for not native search type
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if (bCase)
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return wxItemContainerImmutable::FindString( s, bCase );
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int pos = ListBox_FindStringExact(GetHwnd(), -1, s.t_str());
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if (pos == LB_ERR)
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return wxNOT_FOUND;
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else
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return pos;
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}
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void wxListBox::DoClear()
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{
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#if wxUSE_OWNER_DRAWN
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if ( HasFlag(wxLB_OWNERDRAW) )
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{
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WX_CLEAR_ARRAY(m_aItems);
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}
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#endif // wxUSE_OWNER_DRAWN
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ListBox_ResetContent(GetHwnd());
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m_noItems = 0;
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MSWOnItemsChanged();
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UpdateOldSelections();
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}
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void wxListBox::DoSetSelection(int N, bool select)
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{
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wxCHECK_RET( N == wxNOT_FOUND || IsValid(N),
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wxT("invalid index in wxListBox::SetSelection") );
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if ( HasMultipleSelection() )
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{
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// Setting selection to -1 should deselect everything.
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const bool deselectAll = N == wxNOT_FOUND;
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SendMessage(GetHwnd(), LB_SETSEL,
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deselectAll ? FALSE : select,
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deselectAll ? -1 : N);
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}
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else
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{
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SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
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}
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UpdateOldSelections();
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}
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bool wxListBox::IsSelected(int N) const
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{
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wxCHECK_MSG( IsValid(N), false,
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wxT("invalid index in wxListBox::Selected") );
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return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? false : true;
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}
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void *wxListBox::DoGetItemClientData(unsigned int n) const
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{
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LPARAM rc = SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
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if ( rc == LB_ERR && GetLastError() != ERROR_SUCCESS )
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{
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wxLogLastError(wxT("LB_GETITEMDATA"));
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return NULL;
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}
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return (void *)rc;
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}
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void wxListBox::DoSetItemClientData(unsigned int n, void *clientData)
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{
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if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
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{
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wxLogDebug(wxT("LB_SETITEMDATA failed"));
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}
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}
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// Return number of selections and an array of selected integers
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int wxListBox::GetSelections(wxArrayInt& aSelections) const
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{
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aSelections.Empty();
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if ( HasMultipleSelection() )
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{
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int countSel = ListBox_GetSelCount(GetHwnd());
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if ( countSel == LB_ERR )
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{
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wxLogDebug(wxT("ListBox_GetSelCount failed"));
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}
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else if ( countSel != 0 )
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{
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int *selections = new int[countSel];
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if ( ListBox_GetSelItems(GetHwnd(),
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countSel, selections) == LB_ERR )
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{
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wxLogDebug(wxT("ListBox_GetSelItems failed"));
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countSel = -1;
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}
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else
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{
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aSelections.Alloc(countSel);
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for ( int n = 0; n < countSel; n++ )
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aSelections.Add(selections[n]);
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}
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delete [] selections;
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}
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return countSel;
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}
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else // single-selection listbox
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{
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if (ListBox_GetCurSel(GetHwnd()) > -1)
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aSelections.Add(ListBox_GetCurSel(GetHwnd()));
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return aSelections.Count();
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}
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}
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// Get single selection, for single choice list items
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int wxListBox::GetSelection() const
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{
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wxCHECK_MSG( !HasMultipleSelection(),
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-1,
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wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
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return ListBox_GetCurSel(GetHwnd());
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}
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// Find string for position
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wxString wxListBox::GetString(unsigned int n) const
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{
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wxCHECK_MSG( IsValid(n), wxEmptyString,
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wxT("invalid index in wxListBox::GetString") );
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int len = ListBox_GetTextLen(GetHwnd(), n);
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// +1 for terminating NUL
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wxString result;
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ListBox_GetText(GetHwnd(), n, (wxChar*)wxStringBuffer(result, len + 1));
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return result;
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}
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int wxListBox::DoInsertItems(const wxArrayStringsAdapter & items,
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unsigned int pos,
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void **clientData,
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wxClientDataType type)
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{
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MSWAllocStorage(items, LB_INITSTORAGE);
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const bool append = pos == GetCount();
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// we must use CB_ADDSTRING when appending as only it works correctly for
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// the sorted controls
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const unsigned msg = append ? LB_ADDSTRING : LB_INSERTSTRING;
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if ( append )
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pos = 0;
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int n = wxNOT_FOUND;
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const unsigned int numItems = items.GetCount();
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for ( unsigned int i = 0; i < numItems; i++ )
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{
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n = MSWInsertOrAppendItem(pos, items[i], msg);
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if ( n == wxNOT_FOUND )
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return n;
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if ( !append )
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pos++;
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++m_noItems;
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#if wxUSE_OWNER_DRAWN
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if ( HasFlag(wxLB_OWNERDRAW) )
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{
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wxOwnerDrawn *pNewItem = CreateLboxItem(n);
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pNewItem->SetFont(GetFont());
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m_aItems.Insert(pNewItem, n);
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}
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#endif // wxUSE_OWNER_DRAWN
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AssignNewItemClientData(n, clientData, i, type);
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}
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MSWOnItemsChanged();
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UpdateOldSelections();
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return n;
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}
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int wxListBox::DoHitTestList(const wxPoint& point) const
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{
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LRESULT lRes = ::SendMessage(GetHwnd(), LB_ITEMFROMPOINT,
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0, MAKELPARAM(point.x, point.y));
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// non zero high-order word means that this item is outside of the client
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// area, IOW the point is outside of the listbox
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return HIWORD(lRes) ? wxNOT_FOUND : LOWORD(lRes);
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}
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void wxListBox::SetString(unsigned int n, const wxString& s)
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{
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wxCHECK_RET( IsValid(n),
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wxT("invalid index in wxListBox::SetString") );
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// remember the state of the item
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bool wasSelected = IsSelected(n);
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void *oldData = NULL;
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wxClientData *oldObjData = NULL;
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if ( HasClientUntypedData() )
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oldData = GetClientData(n);
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else if ( HasClientObjectData() )
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oldObjData = GetClientObject(n);
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// delete and recreate it
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SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
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int newN = n;
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if ( n == (m_noItems - 1) )
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newN = -1;
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ListBox_InsertString(GetHwnd(), newN, s.t_str());
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// restore the client data
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if ( oldData )
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SetClientData(n, oldData);
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else if ( oldObjData )
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SetClientObject(n, oldObjData);
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// we may have lost the selection
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if ( wasSelected )
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Select(n);
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MSWOnItemsChanged();
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}
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unsigned int wxListBox::GetCount() const
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{
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return m_noItems;
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}
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// ----------------------------------------------------------------------------
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// size-related stuff
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// ----------------------------------------------------------------------------
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void wxListBox::SetHorizontalExtent(const wxString& s)
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{
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// the rest is only necessary if we want a horizontal scrollbar
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if ( !HasFlag(wxHSCROLL) )
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return;
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WindowHDC dc(GetHwnd());
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SelectInHDC selFont(dc, GetHfontOf(GetFont()));
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TEXTMETRIC lpTextMetric;
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::GetTextMetrics(dc, &lpTextMetric);
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int largestExtent = 0;
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SIZE extentXY;
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if ( s.empty() )
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{
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// set extent to the max length of all strings
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for ( unsigned int i = 0; i < m_noItems; i++ )
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{
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const wxString str = GetString(i);
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::GetTextExtentPoint32(dc, str.c_str(), str.length(), &extentXY);
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int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
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if ( extentX > largestExtent )
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largestExtent = extentX;
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}
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}
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else // just increase the extent to the length of this string
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{
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int existingExtent = (int)SendMessage(GetHwnd(),
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LB_GETHORIZONTALEXTENT, 0, 0L);
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::GetTextExtentPoint32(dc, s.c_str(), s.length(), &extentXY);
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int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
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if ( extentX > existingExtent )
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largestExtent = extentX;
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}
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if ( largestExtent )
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SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
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//else: it shouldn't change
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}
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wxSize wxListBox::DoGetBestClientSize() const
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{
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// find the widest string
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int wLine;
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int wListbox = 0;
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for (unsigned int i = 0; i < m_noItems; i++)
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{
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wxString str(GetString(i));
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GetTextExtent(str, &wLine, NULL);
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if ( wLine > wListbox )
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wListbox = wLine;
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}
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// give it some reasonable default value if there are no strings in the
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// list
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if ( wListbox == 0 )
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wListbox = 100;
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// the listbox should be slightly larger than the widest string
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wListbox += 3*GetCharWidth();
|
|
|
|
// add room for the scrollbar
|
|
wListbox += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
|
|
|
|
// don't make the listbox too tall (limit height to 10 items) but don't
|
|
// make it too small neither
|
|
int hListbox = SendMessage(GetHwnd(), LB_GETITEMHEIGHT, 0, 0)*
|
|
wxMin(wxMax(m_noItems, 3), 10);
|
|
|
|
return wxSize(wListbox, hListbox);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// callbacks
|
|
// ----------------------------------------------------------------------------
|
|
|
|
bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
|
|
{
|
|
wxEventType evtType;
|
|
int n = wxNOT_FOUND;
|
|
if ( param == LBN_SELCHANGE )
|
|
{
|
|
if ( HasMultipleSelection() )
|
|
return CalcAndSendEvent();
|
|
|
|
evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
|
|
|
|
if ( m_selectedByKeyboard )
|
|
{
|
|
// We shouldn't use the mouse position to find the item as mouse
|
|
// can be anywhere, ask the listbox itself. Notice that this can't
|
|
// be used when the item is selected using the mouse however as
|
|
// LB_GETCARETINDEX will always return a valid item, even if the
|
|
// mouse is clicked below all the items, which is why we find the
|
|
// item ourselves below in this case.
|
|
n = SendMessage(GetHwnd(), LB_GETCARETINDEX, 0, 0);
|
|
}
|
|
//else: n will be determined below from the mouse position
|
|
}
|
|
else if ( param == LBN_DBLCLK )
|
|
{
|
|
evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
|
|
}
|
|
else
|
|
{
|
|
// some event we're not interested in
|
|
return false;
|
|
}
|
|
|
|
// Find the item position if it was a mouse-generated selection event or a
|
|
// double click event (which is always generated using the mouse)
|
|
if ( n == wxNOT_FOUND )
|
|
{
|
|
const DWORD pos = ::GetMessagePos();
|
|
const wxPoint pt(GET_X_LPARAM(pos), GET_Y_LPARAM(pos));
|
|
n = HitTest(ScreenToClient(wxPoint(pt)));
|
|
}
|
|
|
|
// We get events even when mouse is clicked outside of any valid item from
|
|
// Windows, just ignore them.
|
|
if ( n == wxNOT_FOUND )
|
|
return false;
|
|
|
|
if ( param == LBN_SELCHANGE )
|
|
{
|
|
if ( !DoChangeSingleSelection(n) )
|
|
return false;
|
|
}
|
|
|
|
// Do generate an event otherwise.
|
|
return SendEvent(evtType, n, true /* selection */);
|
|
}
|
|
|
|
WXLRESULT
|
|
wxListBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
|
|
{
|
|
// Remember whether there was a keyboard or mouse event before
|
|
// LBN_SELCHANGE: this allows us to correctly determine the item affected
|
|
// by it in MSWCommand() above in any case.
|
|
if ( WM_KEYFIRST <= nMsg && nMsg <= WM_KEYLAST )
|
|
m_selectedByKeyboard = true;
|
|
else if ( WM_MOUSEFIRST <= nMsg && nMsg <= WM_MOUSELAST )
|
|
m_selectedByKeyboard = false;
|
|
|
|
return wxListBoxBase::MSWWindowProc(nMsg, wParam, lParam);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// owner-drawn list boxes support
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#if wxUSE_OWNER_DRAWN
|
|
|
|
// misc overloaded methods
|
|
// -----------------------
|
|
|
|
bool wxListBox::SetFont(const wxFont &font)
|
|
{
|
|
if ( HasFlag(wxLB_OWNERDRAW) )
|
|
{
|
|
const unsigned count = m_aItems.GetCount();
|
|
for ( unsigned i = 0; i < count; i++ )
|
|
m_aItems[i]->SetFont(font);
|
|
}
|
|
|
|
wxListBoxBase::SetFont(font);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool wxListBox::GetItemRect(size_t n, wxRect& rect) const
|
|
{
|
|
wxCHECK_MSG( IsValid(n), false,
|
|
wxT("invalid index in wxListBox::GetItemRect") );
|
|
|
|
RECT rc;
|
|
|
|
if ( ListBox_GetItemRect(GetHwnd(), n, &rc) != LB_ERR )
|
|
{
|
|
rect = wxRectFromRECT(rc);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
// couldn't retrieve rect: for example, item isn't visible
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool wxListBox::RefreshItem(size_t n)
|
|
{
|
|
wxRect rect;
|
|
if ( !GetItemRect(n, rect) )
|
|
return false;
|
|
|
|
RECT rc;
|
|
wxCopyRectToRECT(rect, rc);
|
|
|
|
return ::InvalidateRect((HWND)GetHWND(), &rc, FALSE) == TRUE;
|
|
}
|
|
|
|
|
|
// drawing
|
|
// -------
|
|
|
|
namespace
|
|
{
|
|
// space beneath/above each row in pixels
|
|
static const int LISTBOX_EXTRA_SPACE = 1;
|
|
|
|
} // anonymous namespace
|
|
|
|
// the height is the same for all items
|
|
// TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
|
|
|
|
// NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
|
|
// message is not yet sent when we get here!
|
|
bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
|
|
{
|
|
// only owner-drawn control should receive this message
|
|
wxCHECK( HasFlag(wxLB_OWNERDRAW), false );
|
|
|
|
MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
|
|
|
|
#ifdef __WXWINCE__
|
|
HDC hdc = GetDC(NULL);
|
|
#else
|
|
HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
|
|
#endif
|
|
|
|
{
|
|
wxDCTemp dc((WXHDC)hdc);
|
|
dc.SetFont(GetFont());
|
|
|
|
pStruct->itemHeight = dc.GetCharHeight() + 2 * LISTBOX_EXTRA_SPACE;
|
|
pStruct->itemWidth = dc.GetCharWidth();
|
|
}
|
|
|
|
#ifdef __WXWINCE__
|
|
ReleaseDC(NULL, hdc);
|
|
#else
|
|
DeleteDC(hdc);
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
// forward the message to the appropriate item
|
|
bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
|
|
{
|
|
// only owner-drawn control should receive this message
|
|
wxCHECK( HasFlag(wxLB_OWNERDRAW), false );
|
|
|
|
DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
|
|
|
|
// the item may be -1 for an empty listbox
|
|
if ( pStruct->itemID == (UINT)-1 )
|
|
return false;
|
|
|
|
wxListBoxItem *pItem = (wxListBoxItem *)m_aItems[pStruct->itemID];
|
|
|
|
wxDCTemp dc((WXHDC)pStruct->hDC);
|
|
|
|
return pItem->OnDrawItem(dc, wxRectFromRECT(pStruct->rcItem),
|
|
(wxOwnerDrawn::wxODAction)pStruct->itemAction,
|
|
(wxOwnerDrawn::wxODStatus)(pStruct->itemState | wxOwnerDrawn::wxODHidePrefix));
|
|
}
|
|
|
|
#endif // wxUSE_OWNER_DRAWN
|
|
|
|
#endif // wxUSE_LISTBOX
|